import 'dart:core';
import 'package:flutter/material.dart';
import 'package:myapp/src/painter_params.dart';
import 'package:syncfusion_flutter_charts/charts.dart';
//import 'package:syncfusion_flutter_charts/sparkcharts.dart';
//import 'package:interactive_chart/interactive_chart.dart';
import 'candlesticks.dart';
import 'mock_data.dart';
import 'data_api.dart';


void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  bool _darkMode = true;
  bool _showAverage = false;
  TrendLineParams _trends = TrendLineParams(linesColor: {
              5:Colors.yellow, 
              10:Colors.orange, 
              20: Colors.amber,
              30: Colors.amberAccent,
              });
  List<CandleData> _data = MockDataTesla.candles;

  void _loadData() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      // var data = DataApi.get_day_kline('000001.SZ', 20200101, 20211022);
      final String result = DataApi.get_day_kline('000001.SZ', 20200101,20211022);
      //  print('### $result');
      var items = DataApi.parseCandleDataList(result);
      if(items.length < 3){
        print('### data not enugth: ${items.length}');
        return ;
      }
      //_data = items;
      // setState(() { _data = items;});
      //showLoading = false;
      //setState(() {});
      //print('### datas error $_');
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    //CandleData.computeMA(_data, 7);
    //CandleData.computeAll(_data, [5,10,20]);
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
        actions: [
            IconButton(
              icon: Icon(_darkMode ? Icons.dark_mode : Icons.light_mode),
              onPressed: () => setState(() => _darkMode = !_darkMode),
            ),
            IconButton(
              icon: Icon(
                _showAverage ? Icons.show_chart : Icons.bar_chart_outlined,
              ),
              onPressed: () {
                setState(() => _showAverage = !_showAverage);
                if (_showAverage) {
                  _trends.visible = true;
                  //CandleData.computeMA(_data, 7);
                  //CandleData.computeAll(_data, [5,10,20,30]);
                } else {
                  _trends.visible = false;
                  //CandleData.deleteMA(_data);
                }
              },
            ),
          ],
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: InteractiveChart(
            /** Only [candles] is required */
            candles: _data,
            trends: _trends,
            style: const ChartStyle(
              priceGainColor: Colors.red,
              priceLossColor: Colors.green,
              ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _loadData,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
      floatingActionButtonLocation: FloatingActionButtonLocation.startTop,
    );
  }
}
